If you do not know who your insurance company is, you do have a few other options for finding out your insurance status. Start by:
If you cannot find the information in your email or bank statements, reach out to your Secretary of State. This may seem like an escalation, but the Secretary of State often maintains records regarding car insurance.
Finally, if the other methods are not successful, you can request a new car insurance quote. This may seem counterintuitive if you already have car insurance, but when you request a quote, agents will run a report that shows your current insurer and whether your policy has lapsed or not.